My desk of Integrals has the general circumstance ##int frac dx x^2+a^two ## being a 'normal' integral too, not simply the case where by ##a=1##. But I do think this currently being a Calculus homework challenge it is expected with the OP to figure out how to do it. Hints https://gabletoppak.com/sustainable-soap-packaging-benefits-for-indian-consumers/